Cell Reports Medicine (Sep 2020)

Robust T Cell Response Toward Spike, Membrane, and Nucleocapsid SARS-CoV-2 Proteins Is Not Associated with Recovery in Critical COVID-19 Patients

  • Constantin J. Thieme,
  • Moritz Anft,
  • Krystallenia Paniskaki,
  • Arturo Blazquez-Navarro,
  • Adrian Doevelaar,
  • Felix S. Seibert,
  • Bodo Hoelzer,
  • Margarethe Justine Konik,
  • Marc Moritz Berger,
  • Thorsten Brenner,
  • Clemens Tempfer,
  • Carsten Watzl,
  • Toni L. Meister,
  • Stephanie Pfaender,
  • Eike Steinmann,
  • Sebastian Dolff,
  • Ulf Dittmer,
  • Timm H. Westhoff,
  • Oliver Witzke,
  • Ulrik Stervbo,
  • Toralf Roch,
  • Nina Babel

Journal volume & issue
Vol. 1, no. 6
p. 100092

Abstract

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Summary: T cell immunity toward SARS-CoV-2 spike (S-), membrane (M-), and nucleocapsid (N-) proteins may define COVID-19 severity. Therefore, we compare the SARS-CoV-2-reactive T cell responses in moderate, severe, and critical COVID-19 patients and unexposed donors. Overlapping peptide pools of all three proteins induce SARS-CoV-2-reactive T cell response with dominance of CD4+ over CD8+ T cells and demonstrate interindividual immunity against the three proteins. M-protein induces the highest frequencies of CD4+ T cells, suggesting its relevance for diagnosis and vaccination. The T cell response of critical COVID-19 patients is robust and comparable or even superior to non-critical patients. Virus clearance and COVID-19 survival are not associated with either SARS-CoV-2 T cell kinetics or magnitude of T cell responses, respectively. Thus, our data do not support the hypothesis of insufficient SARS-CoV-2-reactive immunity in critical COVID-19. Conversely, it indicates that activation of differentiated memory effector T cells could cause hyperreactivity and immunopathogenesis in critical patients.

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